Untitled
unknown
c_cpp
a year ago
182 B
6
Indexable
Never
#include <iostream>
using namespace std;
int main()
{
long long int i, j, sum;
cin >> i >> j;
sum = ((j*j) + j - (i*i) + i) / 2;
cout << sum << endl;
return 0;
}#include <iostream>
using namespace std;
int main()
{
long long int i, j, sum;
cin >> i >> j;
sum = ((j*j) + j - (i*i) + i) / 2;
cout << sum << endl;
return 0;
}